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.nowrap { white-space:nowrap; }
.pre { white-space:pre; }
.prewrap { white-space:pre-wrap; }
div { border:1px solid black; }
.container { float:left; width:20%; border-color:cyan; }
p { width:0; }
b { font-weight:normal; background-color:yellow; }
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<body>

<div>
<p><b><span>Hello<span> <span>Kitty</span></b>
<p><b><span>Hello<span><span class="pre"> </span><span>Kitty</span></b>
<p><b><span>Hello<span><span class="nowrap"> </span><span>Kitty</span></b>
<p><b><span>Hello<span><span class="prewrap"> </span><span>Kitty</span></b>
</div>

<div class="container">
<p><b><span>Hello<span>  <span>Kitty</span></b>
<p><b><span>Hello<span><span class="pre"> </span> <span>Kitty</span></b>
<p><b><span>Hello<span><span class="nowrap"> </span> <span>Kitty</span></b>
<p><b><span>Hello<span><span class="prewrap"> </span> <span>Kitty</span></b>
</div>

<div class="container">
<p><b><span>Hello<span> <span class="pre"> </span><span>Kitty</span></b>
<p><b><span>Hello<span><span class="pre"> </span><span class="pre"> </span><span>Kitty</span></b>
<p><b><span>Hello<span><span class="nowrap"> </span><span class="pre"> </span><span>Kitty</span></b>
<p><b><span>Hello<span><span class="prewrap"> </span><span class="pre"> </span><span>Kitty</span></b>
</div>

<div class="container">
<p><b><span>Hello<span> <span class="nowrap"> </span>Kitty</b>
<p><b><span>Hello<span><span class="pre"> </span><span class="nowrap"> </span><span>Kitty</span></b>
<p><b><span>Hello<span><span class="nowrap"> </span><span class="nowrap"> </span><span>Kitty</span></b>
<p><b><span>Hello<span><span class="prewrap"> </span><span class="nowrap"> </span><span>Kitty</span></b>
</div>

<div class="container">
<p><b><span>Hello<span> <span class="prewrap"> </span>Kitty</b>
<p><b><span>Hello<span><span class="pre"> </span><span class="prewrap"> </span><span>Kitty</span></b>
<p><b><span>Hello<span><span class="nowrap"> </span><span class="prewrap"> </span><span>Kitty</span></b>
<p><b><span>Hello<span><span class="prewrap"> </span><span class="prewrap"> </span><span>Kitty</span></b>
</div>

</body>
</html>
